Note the mention of a "heat reservoir" this is essentially a heat sink that keeps the gas at a constant temperature. This is not disputed by the majority of audio professionals or thermodynamics experts but there are a few that have made absurd claims to the contrary. The compliance of air goes up, ideally, by 1.4 when the system moves from adiabatic to iso-thermal. This has been extensively studied in thermodynamics simply to understand the nature of gases. These materials also act as a heat sink for the air taking it from an adiabatic system to iso-thermal. Standing wave modes are powerful and cause the walls to flex more than anything else and therefore reducing standing wave energy will indirectly reduce wall flex. They also partially, and sometimes poorly, absorb all frequencies and perhaps reduce re-radiation due to reflections in the box and back out the cone, but this is not often a primary issue. One is that they are an acoustical resistance and therefore absorb acoustic energy significantly reducing standing wave mode resonances in the box - usually at midbass frequencies for large bookshelf speakers. There are two independent things that fiberous and foam fillings do in an enclosure.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |